Question Related to using Gridview with checkbox

//Loop through all the rows in gridview
foreach(GridViewRow gvrow in gvUserDetails.Rows)
{
    //Finiding checkbox control in gridview for particular row
    CheckBox chkdelete = (CheckBox)gvrow.FindControl("chkdelete");
    //Condition to check checkbox selected or not
    if(chkdelete.Checked)
    {
        //Getting UserId of particular row using datakey value
        int usrid = Convert.ToInt32(gvUserDetails.DataKeys[gvrow.RowIndex].Value);
        
        //Delete logic by using above key value.
    }
}